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/*
Copyright (C) 2018 Daniel Schultz
This file is part of FLINT.
FLINT is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version. See <https://www.gnu.org/licenses/>.
*/
#include "mpn_extras.h"
#include "nmod_vec.h"
#include "mpoly.h"
#include "nmod_mpoly.h"
void nmod_mpoly_resize(
nmod_mpoly_t A,
slong new_length,
const nmod_mpoly_ctx_t ctx)
{
slong old_length = A->length;
slong N;
new_length = FLINT_MAX(WORD(0), new_length);
N = mpoly_words_per_exp(A->bits, ctx->minfo);
if (new_length > old_length)
{
nmod_mpoly_fit_length(A, new_length, ctx);
/* must zero out the new coeffs/exps past the old end */
N = mpoly_words_per_exp(A->bits, ctx->minfo);
flint_mpn_zero(A->exps + N*old_length, N*(new_length - old_length));
_nmod_vec_zero(A->coeffs + old_length, new_length - old_length);
}
A->length = new_length;
}